#include<bits/stdc++.h>
#define int long long
#define mod 998244353ll
#define pii pair<int,int>
#define fi first
#define se second
#define mems(x,y) memset(x,y,sizeof(x))
using namespace std;
const int maxn=200010;
const int inf=1e18;
inline int read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch-48);ch=getchar();}
	return x*f;
}
bool Mbe;

int a,b,c;
vector<int> p;
map<pii,int> dp;
int dfs(int a,int c){
	if(dp[{a,c}])return dp[{a,c}];
	if(a==1)return 0;
	int ans=a-1;
	for(int i:p)if(c%i==0){
		ans=min({ans,a%i+1+dfs(a/i,c/i),(i-a%i)%i+1+dfs(a/i+1,c/i)});
	}
//	cout<<a<<" "<<c<<" "<<ans<<"\n";
	return dp[{a,c}]=ans;
}
void work(){
	a=read();b=read();p.clear();
	if(a>b)swap(a,b);
	c=b-a;int x=c;
	for(int i=2;i*i<=x;i++)if(x%i==0){
		p.push_back(i);
		while(x%i==0)x/=i;
	}
	if(x>1)p.push_back(x);
	printf("%lld\n",dfs(a,c));
}

// \
444

bool Med;
int T;
signed main(){
//	freopen(".in","r",stdin);
//	freopen(".out","w",stdout);
	
//	ios::sync_with_stdio(0);
//	cin.tie(0);cout.tie(0);
	
//	cerr<<(&Mbe-&Med)/1048576.0<<" MB\n";
	
	T=read();
	while(T--)work();
}